公开(公告)号：US5262635A

公开(公告)日：1993-11-16

申请号：US882184

申请日：1992-05-12

Applicant: Raul Curbelo

Inventor： Raul Curbelo

IPC: G01J3/45 ,  G01J1/08 ,  G01J3/453 ,  G01N21/27 ,  H01J40/14 ,  H01J43/30 ,  H03G11/08

CPC classification number: G01N21/274 ,  G01J2001/086 ,  G01J3/453

Abstract: A technique that corrects photodetector non-linearity without increasing the noise level in the detector signal. The detector is coupled to a preamplifier characterized by the absence of positive feedback, and the preamplifier signal is communicated to a linear amplifier whose output signal is then digitized. The digitized signal is then transformed according to stored calibration information that is representative of the non-linear characteristic of the photodetector. The transformed digitized value thus exhibits a linear characteristic as a function of the intensity of the light source. A number of embodiments perform the correction in hardware before digitizing the signal.

Abstract translation: 一种在不增加检测器信号中的噪声电平的情况下校正光电探测器非线性的技术。 检测器耦合到前置放大器，其特征在于不存在正反馈，并且前置放大器信号被传送到线性放大器，其输出信号然后被数字化。 然后，根据存储的代表光电检测器的非线性特征的校准信息来变换数字化信号。 因此，经变换的数字化值表现出作为光源的强度的函数的线性特性。 许多实施例在数字化信号之前执行硬件校正。

公开(公告)号：US5004904A

公开(公告)日：1991-04-02

申请号：US365385

申请日：1989-06-13

Applicant: Tsutomu Yamakawa ,  Hiroaki Kobayashi

Inventor： Tsutomu Yamakawa ,  Hiroaki Kobayashi

IPC: G01J1/08 ,  G01J1/18 ,  G01J1/44 ,  G01T1/208

CPC classification number: G01T1/208 ,  G01J1/18 ,  G01J2001/086 ,  G01J2001/4406 ,  G01J2001/4453

Abstract: A measurement of standard light is performed during radiation measurement for gain correction and offset correction of radiation measurement apparatus. The standard light emitted by a LED falls on a PMT. An output signal of a preamplifier corresponding to the PMT is entered into a system controller after being subjected to predetermined analog signal processing. The system controller calculates a gain correction value and an offset correction value on the basis of initial correction values and an output value of the preamplifier, whereby gain control and offset control can be performed stably even in radiation measurement.

公开(公告)号：US09400245B2

公开(公告)日：2016-07-26

申请号：US14440660

申请日：2013-11-19

Applicant: Shimadzu Corporation

Inventor： Yusuke Yokoi

IPC: G01J1/00 ,  G01N21/27 ,  G01N30/86 ,  G01J1/42 ,  G01J1/02 ,  G01J1/44 ,  G01J1/08

CPC classification number: G01N21/274 ,  G01J1/0228 ,  G01J1/4257 ,  G01J2001/086 ,  G01J2001/444 ,  G01N30/8641

Abstract: There are provided a drift calculation device capable of accurately calculating a drift by using a buffer of smaller capacity, and a light detection device provided with the same. Every time measurement intensity is input according to a predetermined cycle, data in a plurality of sum buffers 321 to 324 are updated based on at least one of the measurement intensity and the measurement time at that time. The sum buffers 321 to 324 are assigned respectively to a plurality of sum functions forming a coefficient included in a calculation formula for calculating a drift by using the least squares method. A drift is calculated by substituting the updated data in the plurality of sum buffers 321 to 324 in the calculation formula. Since it is not necessary to store all the measurement intensity input at the predetermined cycle, a drift is accurately calculated by a buffer of smaller capacity.

Abstract translation: 提供了能够通过使用容量较小的缓冲器来精确地计算漂移的漂移计算装置和具有该漂移计算装置的光检测装置。 每当根据预定周期输入测量强度时，基于此时的测量强度和测量时间中的至少一个来更新多个和缓冲器321至324中的数据。 和缓冲器321至324分别被分配给形成用于通过使用最小二乘法计算漂移的计算公式中包括的系数的多个和函数。 通过在计算公式中替换多个和缓冲器321至324中的更新数据来计算漂移。 由于不需要以规定的周期存储所有的测量强度输入，所以通过较小容量的缓冲器精确地计算漂移。

公开(公告)号：US20140284456A1

公开(公告)日：2014-09-25

申请号：US13840870

申请日：2013-03-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Satoshi Okada ,  Shoshiro Saruta

IPC: G01J1/42 ,  G01T1/16

CPC classification number: G01J1/42 ,  G01J1/0295 ,  G01J1/58 ,  G01J2001/086 ,  G01T1/24

Abstract: A radiation detection apparatus includes a substrate; a pixel area constituted of one or more pixels including a sensor element on the substrate; and a light source, wherein the light source is disposed at a side of the substrate in which the pixel area is disposed and outside of the pixel area, and light from the light source is incident on the sensor element.

Abstract translation: 辐射检测装置包括：基板; 由一个或多个像素构成的像素区域，其包括在所述基板上的传感器元件; 以及光源，其中，所述光源设置在所述基板的设置有所述像素区域并且位于所述像素区域外侧的一侧，并且来自所述光源的光入射到所述传感器元件上。

公开(公告)号：US5340974A

公开(公告)日：1994-08-23

申请号：US805445

申请日：1991-12-09

Applicant: Edward F. Zalewski

Inventor： Edward F. Zalewski

IPC: G01J1/08 ,  G01J1/30 ,  G01J3/10 ,  G01J3/28 ,  G01J5/52 ,  G01J5/60 ,  G01J1/32

CPC classification number: G01J1/08 ,  G01J3/10 ,  G01J1/30 ,  G01J2001/086 ,  G01J5/522 ,  G01J5/60

Abstract: A light source (12) emits radiation which is maintained at a desired intensity by use of a photodetector which views the radiation and has a fixed relationship between incident radiation and output photodetector (18) current. Intensity of the radiation is established by varying electric current applied to the source, via a feedback loop (42, 24, 22, 34), to attain a reference value of the photodetector current, the photodetector current being representative of the desired value of radiation intensity. This procedure may be performed first in an air environment with a specific optical assembly of source and photodetector to establish the reference value of photodetector current for a desired value of radiation intensity. Thereupon, the optical system may be operated in a vacuum environment, and a monitoring of the photodetector current establishes the desired value of radiation intensity. Alternatively, the source is operated at a fixed value of excitation current, and an iris (44) or other radiation attenuator is operated to produce the reference value of photodetector current.

Abstract translation: 光源（12）通过使用观察辐射并具有入射辐射与输出光电检测器（18）电流之间的固定关系的光电检测器发射保持在期望强度的辐射。 通过改变施加到源极的电流，经由反馈环路（42,42,22,34）来建立辐射强度，以获得光电检测器电流的参考值，光电检测器电流代表期望的辐射值 强度。 可以在具有源和光电检测器的特定光学组件的空气环境中首先执行该过程，以建立辐射强度的期望值的光电检测器电流的参考值。 因此，光学系统可以在真空环境中操作，并且对光电检测器电流的监测建立期望的辐射强度值。 或者，源以激励电流的固定值操作，并且操作虹膜（44）或其它辐射衰减器以产生光电检测器电流的参考值。

公开(公告)号：US4708477A

公开(公告)日：1987-11-24

申请号：US829273

申请日：1986-02-13

Applicant: Yabusaki Kenji ,  Tozawa Hitoshi ,  Noda Akira ,  Ito Takashi

Inventor： Yabusaki Kenji ,  Tozawa Hitoshi ,  Noda Akira ,  Ito Takashi

IPC: G01J1/08 ,  G01J1/42 ,  G01J1/44

CPC classification number: G01J1/04 ,  G01J1/02 ,  G01J1/0228 ,  G01J1/0455 ,  G01J1/0466 ,  G01J1/08 ,  G01J3/02 ,  G01J3/0232 ,  G01J3/0243 ,  G01J3/0248 ,  G01J3/027 ,  G01J3/1804 ,  G01J3/42 ,  G01J2001/086 ,  G01J2001/4453 ,  G01J2001/446

Abstract: A photometrical apparatus has a first light receiving element, and a second light receiving element less sensitive to temperature and other environmental influences than said first light receiving element whereby a value Pm of measured quantity of light from the subject is calculated from the following formula ##EQU1## Pr designates a quantity of light from a standard light source, Dr and Dm designate outputs of the first light receiving element generated by the light from the standard light source and the subject, Dpo and Dpt designate outputs of the first light receiving element generated by the light from the reference light source and the subject, and Dso and Dst designate outputs of the second light receiving element generated by the light from the reference light source and the subject.

Abstract translation: 光度测量装置具有第一光接收元件和对所述第一光接收元件的温度和其他环境影响不敏感的第二光接收元件，从而根据以下公式计算来自被摄体的测量光量的值Pm Pr表示来自标准光源的光量，Dr和Dm表示由来自标准光源和被摄体的光产生的第一光接收元件的输出，Dpo和Dpt表示由第一光接收元件产生的第一光接收元件的输出， 来自参考光源和被摄体的光，Dso和Dst表示由来自参考光源和被摄体的光产生的第二光接收元件的输出。